Reversible variable-speed driving-gear.



PATENTE-D JAN. 15, 1907.

G'. RTADINI. REVERSIBLE VARIABLE SPEED DRIVING GEAR.

APPLIUATION FILED FEB- 8. 1906'.

Hi5 TTY Tu: NORRIS FEYERS co.. wasmlvcron. v. c.

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causing the said,

PATENT OFFICE.

'eEnoMn F. menu, on NEW YORK, N. Y.

{REVERSIBLE VARIABLE-SPEED DRIVING-GEAR;

Spe'ci fication of Letters Patent.

Patented J an. 15, 1907.

Application filed February 8, 1906. Serial No. 300,034.

To all whom it may concern:

Be it known that I, G-ERoMn F. TADINI, a

citizen of the United States, residing in the borough of Manhattan,city, county, and State of New York, have invented an 1mprovement inReversible Variable- Speed Driving-Gears, of which the following is aspecification,

My -'nven tion relates to a reversible .variablespeed drive-gear, isparticularly adapted for motor-car use, and in carrying out myinventionl employ, together with a driven shaft and the driven membersconnected thereto, adevice slidable on the said driven shaft andrevoluble therewith, auxiliary shafts adapt-ed to be turned in oppositedirections, drive pulleys slidably mounted on the said auxiliary shafts,friction-pulleys loosely-mounted 011 the said driven shaft, means formaintaining .the friction-pulleys against the drive-(pulleys, means fornormally evice to engage. one of the said friction-pulleys, means forcausing the said device to engage the other friction-pulley, andmeansfor shifting the said pulleys to. and away from one another to vary thespeed at which the drivenshaft is turned, all of which gWVlll be-hereinafter more particularly described. I v

- In the drawings, Figure 1. is-a sectional plan illustrating, myimproved apparatus. Fig.2 :is' a sectional elev ation on line :0 ac,Fig. 1; Fig; 3 is a partial section taken at right angles to that shownin-Fig. land illustrating the movable bar by which the contact device isshifted on the driven shaft, and I Fig; A; is a diagrammatic viewillustrating a modification of my improved device, 7 j

In the drawings, a designates a driven shaft whose opposite ends. may beconstructed. to receive the drive-wheels of the motorvehicle, whose hubsare indicatedat 2.

b is a double-cone clutch mounted, preferably, centrally on thedrivenshaft a, slidahle thereon, and made to turn therewith by suitablekeys or splines 3 1. The opposite endsv of the clutch member I) arepreferably tapered and provided with screw-threads 5 6, respectively: II v j V The driven-shaft a, is fitted with suitable sleeves c c. Atrightangles to the driven shaft wandwvith their axes in thesame planetherewith I employ auxiliary drive-shafts d d, jour'na-led at theiradjacent ends in bearing's 7 '8, respectively,- and in ;close proximityto the surface of the :double-ended-cone On the auxiliary shafts d re;

spectively. The drive-pulleys e e are preferably conical, and secured toeach one of these members, respectively, is a collar 11 1 2 and thesecollars are also keyed to their-respective auxiliary shafts and movablethereon with the said drive-pulleys e e.

f designate friction-pulleys whose hubs e 13 14, respectively, areloosely mounted on sleeves c c on the driven shaft a, and thesefriction-pulleys f f 'arealso preferably conical, the inclination of thefaces thereof corresponding with the inclinationofthe faces ofthe-drive-pulleys e e The inner adjacent portions of the hubs 13 14ofthe; friction-pulleys are correspondingly recessed and similarlyprovided with screw-threads 15 16, c0rresponding with andadapt-ed to beengaged, respectively, by the screw-threads 5 (ion the tapering ends ofthe screw-threadedt aperingended member I). I V I At the outer ends ofthe hubs 13 14 of the frictionpulleys ff the sleeves c c are fitted,respectively, with movable-collars 17 18, and at, an appreciabledistance from these movable collars 17 18 thesaidsleeves c c areprovided with collars 19-20, and extending between the said collars 1719 and 18 20 and surrounding the said sleeves c 0, respectively, Iemploy helical or other springs 21 22, whose function, as will beapparent, is to maintain the-conicalfaces of the friction-pill.- leysffcontact with the faces of the drive. pulleys e e, and surrounding thedriven shaft a, and extending between the inner endofthe sleeve 0 andthe adjacent end'of the double cone clutch b I employ a spring 23,preferably helical, whose functiomas will be apparent, is to maintainthedouble-cone clutch b in such a. position that screw-threads. 5 on theleft-hand end thereof Will engage thescrewthreads 16 in the hub ,ofthefriction-pulleyf.

On the left-hand side of the clutch member I) I employ a movable barh,-let into a suitable longitudinal recess in, the driven member a, andbetween the same and the sleeve 0.. One end of the vmovable bar h isprovided with a projection h, adapted to contact with the end of theclutch member l).v Theopposite end of the movable bar h is fitted with acontact: piece 24, extending through suitable slot 25 in thesleeve c andadapted to be engaged by a collar26, which is loosely fitted on thesleeve c and rovided with a rod 27, to which is attached a handle 28, bywhich, through the movement caused by the movable handle28, the movablebar it may be actuated to throw the clutch member I) out of engagementwith the friction-pulley f and into engagement with the friction-pulleyf against the action of the spring 23.

The cylindrical eriphery of the clutch member I) is provi ed in suitablepositions with circumferential recesses 29, preferably semicircular incross-section, and'within these recesses 29 I may employ bands 30, whichat diametrically opposite points are outturned, as indicated at 31, andmaintained in this position by means of the spanners 32 or otherwise,and the outwardly-turned portions 31 of the bands 30 are each connectedto a bar 33. Arms 34 35 are connected, respectively,

to the upper and lower c'onnecting-bars 33,

and to the arm 34 a handle 36 is secured.

The collar 11 is provided witha spanner 37 and the collar 12 with asimilar spanner 38, and a connecting-rod i is pivotally i onnected atone end to the spanner 37 and at the opposite end to the bar 34, whilethe connectingrod 4, is similarly pivotally connected at one end to thespanner 38 and at the op'po'site'end to the arm 35, by'which structureit will be manifest that through the forward or back ward movementof thehandle 36 the pulleys e 6 may be moved toward and away from one anotherto increase or diminish the speed at which the driven shaft is turned. a7

It will also be understood that I do not limit myself either to themechanism hereinbefore described for, shifting the drivepul leys ea orfor causing thedisengagement of the clutch with one ofthefriction-pulleys and the engagement of the same with the otherfriction-pulley, as other and equivalent means may be employed toperform these'functions without departing from the natureand spirit ofmy invention, and,'furthermore, it will also be apparent that thereversible variablespeed driving-gear comprising my present inventionmay be inclosed within a suitable casing Z, secured in any desiredmanner to sup ort Z, and the driven shaft m provided wit a sprocket m,through which the shaft 12 to which the power is to -be supplied, isdriven by means of the sprocket-wheel n thereon and the chain 0, passingaround the aforesaid sprockets, as shown in Fig. 4f

It is to be understood that the pitch and depth of the teeth on theinclined sides of the clutch member I) and the hubs of thefriction-pulleys f f are such that the slightest variation in speed'ofone or the other of these members will cause a sufficient disengagementof the teeth to separate the one member from the other and also that ina state of rest or non-operative condition the teeth on the clutchmember I) do not engage the teeth on the hub of either friction-pulleyin such a manner that the clutch member cannot be readily shifted on thedriveshaft a, such an engagement taking place .only when the clutchmember I) and the opposite directions on their respective bear ings onthe drive-shaft'a. 1

Assuming that the parts as shown arein theposition for driving thevehicle forward, the friction-pulley) engages the clutch memher I), andthrough the same the power is transmitted to the drive-shaft 0/ andvehiclewheels '-To increase or decrease the speed, as will be -apparent, the drive-p1illeys e may be moved tow-ardor away from one another bymeans of the handle 36 on the-lever 34- and associated parts, and toreverse the "mechanism it is only necessary to cause the clutch member band friction-pulleyf to turn at a'diff'erent rate'of speed, whichmanifestly maybe done in a number of ways-for instance, by reducing thepower or reducing the speed at which the friction-pulleyfrs turning byseparating the drive-pulleys e ewl e'reupon through the levers 27 and28and the bark the clutch member 1) maybe shifted on the drive-shaft a tocause the same to engage with the friction-pulley f, which turning inthe opposite direction will necessarily re"- verse the direction ofrotation of the driveshaft a. Manifestly the clutch member I) may befreed in a similar manner from the friction-pulleyf, whereupon it willbe automatically shifted on the drive-shaft a, by means of a spring 23.

lclaim as my invention 1. In a reversible variable-speed drivegear, adriven shaft, a device slidably mounted thereon and revolubletherewitlnmembers loosely mounted on said shaft on both sides of thesaid device, means for turning gear, a driven'shaft, a device slidablymounted thereon and revoluble therewith, members loosely mounted "onsaid shaft on both sides ofthe said device, means for turning saidmembers on the sh aft, means for causing the said device to normallyengage one of the said. members and means for causing the said device toengage the other of the said members. v i

3. In a reversible variable-speed drivegear, a driven shaft, a deviceslid ably mounted thereon and revoluble therewith, members looselymounted on said shaft on both sides of said device, means for turningsaid members on the'said shaft, means for'shifting the aforesaid meansforvarying the speed at which the said driven shaft is turned and meansfor-causing the said device to normally'engage one of the said members.

4. In a reversible variable-speed drivegear,--adriven shaft, adeviceslidab'ly mounted thereon and'grevoluble therewith, membersloosely'mounted on said shaft on both sides of said device, means'forturningsai'd members on the saidsh aft, means for-shifting the aforesaidmeans for varyin the speed at which the saiddriven shaft is-turned,means for causing the'said device to normally enr gage one of the saidmembers and means for causing-the said device to engage the other of thesaid members. I r

5. In a reversible "variable-speed drivegear, a driven shaft, adeviceslidably mounted on the said shaft and revoluble therewith,members loosely mounted on said shaft on both sides of the said device,aux-iliary shafts, drive pulleys slidably mounted thereon, means formaintaining the said-members in contact with the said drive-- pulleysand means for maintaining the said device in contact normally with oneof the said members. 4 I

' 6. In a reversible variable-speed drivegear a driven shaft, a deviceslidably mounted on the said shaft and. revoluble therewith, membersloosely mounted on said shaft on both'sides of'the said device,auxiliary shafts, drive-i pulleys slidably mounted. thereon, means formaintaining. the said members in contact with the said drive-pulleys,means for maintaining the said device in contactnormallywith one of thesaid members and means for causing the said device to engage the otherof the said members,

7. In a reversible variable-speed drivegear, a-driven shaft, a deviceslidably mount ed thereon and revoluble therewith, members looselymounted on the said shaft on both sides of thesaid device,-auxiliary-shafts, drivepu'lleys slidably mounted thereon, meansforshifting the said drive-pulleys on the said auxiliary shafts, means"for maintaining the said members in contact with the saiddrive-pulleysand means for maintaining the said device in contactnormally withone of the said members. v

8. In a reversible variable speed drivegear, a driven shaft,a-deviceslidably mounted'thereon and revoluble therewith, membersloosely mounted on the said shaft on both sides of the said device,auxiliary shafts, drive --pulleys slidably mounted thereon, means forshifting the said drive-pulleys on the said auxiliary shafts, means formaintaining the said members in contact with the said drive-pulleys,means for maintaining the said device in contact normallywith one of thesaid members and means for causingfor turning the said members on theshaft and means for causing the said device to normally engage one ofthe said members 1 10. In a reversible variable-speed drivegear} -adriven shaft, driven members connected therewith, adevice slidablymounted on the said driven shaft and revoluble therewith, membersloosely mounted on the said shaft on both sides of thesaid device, meansfor turning the last aforesaid members on the shaft, means for causingthe said device to normally engage one of the said members and means forcausing said device to engage the other of the said members. 1

11. In a reversible variable-speed drivegear, a driven shaft, a deviceslida'bly mounted on the said shaft and revolubletherewith,friction-pulleys mounted loosely on the said driven shaft on both sidesof said device, auxiliary shafts, drive pulleys mounted on saidauxiliary shafts, springs for maintaining the said friction-pulleys incontact with the said drive-pulleys and means for maintaining the saiddevice in contact normally with one of thesaid friction-pul,

leys.

v 12. In a reversible variable-speed drivegear, a driven shaft, adevice'slidablyrmounted on the said'shaft andrevoluble therewith,drive-pulleys mounted loosely on the said drivenshaft on both sides ofsaid device, auxiliary shafts, drive pulleys slidably mounted on saidauxiliary shafts, springs for maintaining the said friction-pulleys incontact with thesaid drive-pulleys, a spring for normally maintainingthe said device in contact with one 'ofthe said friction-pulleys andmeans for sliding the'said device to cause the same to engage the otherfriction-pulley- 13-. In a -reversible variable-speed drivegear, adrivenshaft, a device slidably mounted on the said shaft and revolubletherewith, friction-pulleys loosely mounted on the said shaft on bothsides of'the said device, auxiliary shafts, drive-pulleys slidablymounted thereon, means for maintaining the said frictio'n pulleys-incontact with the said drivepulleys, means for normally maintaining thesaid device in contact with one of the said frictionpulleys and meansfor shifting the said drive-pulleys on the auxiliary shafts for varyingthe speed at which the driven shaft is turned. v i

- 14. In a reversible variable-speed drivegear, a drivenshaft, a deviceslidablymounted on the said driven shaft and revoluble slidablytherewith, friction-pulleys loosely mounted on the said shaft on bothsides of the said device, auxiliary shafts, drive-pulleys slidablymounted thereon, means for maintaining the said friction-pulleys incontact with the drive-pulleys, a spring for normally maintaining thesaid device in contact with. one of the said friction-pulleys, a movablebar set longitudinal-1y into the surface of the said driven-shaft andbearing at one .end against a side of the said slidable device and anarm and handle connected to the opposite end of the said movable bar foractuating the same .to cause the said slidable device to engage theopposite friction-pulley.

15. In a reversible variable-speed drivegear, a driven shaft, a deviceslidably mount- .ed on the said driven shaft and revoluble therewith,friction-pulleys loosely mounted on the said shaft on both sides of thesaid device, auxiliary shafts, drive-pulleys slidably mounted thereon,means for maintaining the said friction-pulleys, in contact with thedrive-pulleys, a spring for normally maintaining the said device incontact with one of i the said friction-pulleys, a movable bar setlongitudinally into the surface of the said driven shaft and bearing atone end against a side of the said slidable device, an arm and handleconnectedvto the oppositeend of the said movable bar for actuating thesame to cause the said slidable device to engage the oppositefriction-pulley, bands surrounding the said slidable device,connecting-rods connected to the said bands at diametrically oppositepoints and extending between the 1 same respectively and thedrive-pulleys, and i .an arm and a handle connected to the said bandssurrounding the slidable device through the operation of which the saiddrive-pulleys may be shifted tovvary the speed atwhich the driven shaftis'turned.

16.,In .a reversible variable-speed drivegear, a driven shaft, adouble-cone clutch slidably I mounted thereon and revoluble Itherewithand whose opposite ends are screwthreaded," friction-pulleysmounted loosely on both sides of the saidhclutch, auxiliary shafts,drive-pulleys slidably mounted on the said auxiliary shafts, springs formaintaining the said frictionrpulleys incontact with the saiddrive-pulleys and means for maintaining the said cone-clutch in contactnormally with one of the'said friction-pulleys.

17.-;In a reversible variable-speed drivegear, a driven shaft, acone-clutch slidably mounted thereon and revoluble therewith andprovided on its opposite ends. with screwthreads, drive-pulleys mountedloosely on the said driven shaft on both sides of the said cone-clutchand provided in their inner hub portions with screw-threaded recessesadapted to receive and be engaged. by the said screw-threaded ends ofthe cone-clutch, auxiliary shafts, drive-pulleys slidably mounted on thesaid auxiliary shafts, springs for maintaining the said friction-pulleysin contact 7 with the drive-pulleys, a spring for normally maintainingone end of the cone-clutch in engagement with the screw-threaded recessin one of the said friction-pulleys and means for sliding the saidcone-clutch to cause the opposite end of the same to engage thescrewtlireaded recess in the other friction-pulley.

18. In a reversible variable-speed drivegear, a driven shaft, acone-clutch slidably mounted thereon and revoluble therewith andprovided on its'opposite ends with screw threads, friction-pulleysloosely mounted on said driven shaft on both sides of the saidcone-clutch and whose inner hub portions are provided with conicalscrew-threaded recesses adapted to receive and engagejithescrew-threaded ends of the cone-clutch, auxiliary shafts, drive-pulleysslidably mounted thereon, means for maintaining the said frictionpulleysin contact with the drive-pulmounted thereon and revoluble therewith andprovided at its opposite ends with screw"- threads, frictionepulleysloosely mountedon the driven shaft on both sides of the cone-i clutch,auxiliary shafts at right angles to the said driven shaft, drive-pulleysslidably mounted on the auxiliary shafts, means for maintaining the saidfriction-pulleys in contact with the drive-pulleys, a spring fornormally maintaining the said cone-clutch in contact with one of thesaid friction-pulleys, a movable bar set longitudinally into the surfaceof the said driven shaft and bearing at one end against one side of thesaid coneclutch, and an arm and a handle secured thereto connected totheopposite end of the said movable bar for actuating the same to causethevsaid cone-clutch to engage the opposite friction-pulley.

.. 20. In a reversible variable-speed drivegear, a driven shaft, acone-clutch slidably' mounted thereon, revoluble therewith and providedon its opposite ends with screw- .threads, friction-pulleys looselymounted on the said driven shaft on both sides of the said,

cone-clutch and whose inner hub portions are provided with conicalscrew-threaded recesses adapted to receive and engage the screw-threadedends of the cone-clutch, auxiliary shafts at right angles to the saiddriven IIS shaft, drive-.pulleys slidably mounted on the auxiliaryshafts, means for maintaining the said friction-pulleys in contact Withthe drive-pulleys, a spring for normally maintaining one screw-threadedend of the said cone-clutch in contact With the screwthreaded recess inone of the said frictionpulleys, a movable bar set longitudinally intothe surface of the said driven shaft and bearing at one end against theend of the said cone-clutch, an arm and a handle connected to theopposite end of said movable bar for actuating the same to cause thescrew-threads on the opposite end of the cone-clutch to come intoengagement with the screw-threaded recess in the other friction-pulley,bands I surrounding the said cone-clutch, bands connected to the saiddrive-pulleys, connectingrods extending between the said bandssurrounding the cone-clutch and the bands connected with the saiddrivepulleys, and an arm and a handle connected to the said bandssurrounding the clutch, throughvthe operation of which, the saiddrive-pulleys may be shifted to vary the speed at Which the driven shaftis turned.

Signed by me this 25th day of January,

GEROME F. TADINI. Witnesses:

GEO. T PINoKNEY, E. ZACHARIASEN.

